Liquid gun



A ril 29, 19m.v A, MARRA 2,24QM6 LIQUID GUN Filed Sept. 25, 1939INVENTOR. ANTHONY MAIZRA BY waif-Z.

ATTORNEYS Patented Apr. 29, I941 STATES PATENT OFFICE LIQUID GUN vAnthony Marra, Brooklyn, N. Y. Application September 25, 1939, SerialNo. 296,341

(ci ar-v8) 3 Claims.

The present invention relates to a liquid gun and particularly relatesto a gun which may be utilized for ejecting and forcing plastic orviscous materials to a utilized.

It is among the objects of the present invention to provide an improved,simple, inexpensive gun of the character above described which may bereadily utilized and operated by hand, which is of few parts and whichmay be readily constructed and repaired.

In the usual type of guns now used, it is customary to have a longpiston actuating rod which extends axially through the cylinder andwhich not only increases the length of the device and the difliculty ofstorage but also necessitates actuation of the ejector at a substantialdistance away from the nozzle thereof.

It is among the objects of the present inven tion to provide an improvedpiston actuating device which may be utilized for guns of the characterdescribed and also for other purposes, which will be devoid of saidelongated piston actuating members or of long threaded rods and which,at the same time, may be actuated closely adjacent the piston and thepoint of ejection of the fluid liquid or viscous solid from the nozzlesof the gun.

Still further objects and advantages will appear from the more detaileddescription set forth below, it being understood, however, that thismore detailed description is given by way of illustration since variouschanges therein may be made by those skilled in the art withoutdeparting from the scope and spirit of the invention.

In accomplishing the above objects it has been found, according to oneembodiment of the invention, to provide a cylinder in which there ispositioned a piston, said cylinder having at its outlet end a capprovided with a nozzle which may be connected thereto by a bayonetjoint.

The piston in the preferred form is preferably operated by a pawlarrangement cooperating with a metal tape, said tape being designed topress the piston forwardly to form ejection of the plastic or viscousmaterial through the nozzle thereof.

Preferably, this tape is caused to ride upon the cylinder and may bereadily restored to its initial position by a pull member on theexterior of the gun.

The pawl may be most conveniently connected to a trigger member which bypressure against a fixed handle rigid with the body of the gun may becaused to press the piston forwardly.

place where they may be- It is to be understood that the tape which willbe particularly described in connection with a gun may also be utilizedin connection with other piston operated devices whether used forejection guns or for other purposes.

Referring to the drawing which illustrates several of the variouspossible embodiments of the present invention, but to which the presentinvention is by no means restricted since the drawing is merely by wayof illustration and not by way of limitation;

Figure 1 is a top view in partial section of the gun according to oneembodiment of the present invention.

Figure 2 is a vertical section upon the line 2-2 of Figure 1.

Figures 3 and 4 are respectively transverse sections upon the lines 33and 4-4 of Figure 2.

Figure 5 is a perspective view of the trigger element removed from thegun.

Referring to Figures 1 to 4, the gun is provided with a barrel A, a capB, a piston C, an actuating tape D and a pawl arrangement E.

r The cylinder A may be formed of a cylinder of sheet metal, asindicated at H), and the cap B may be connected to the end I I thereofby the pins I2 in said end I l and the right angular slots l3 in theflange M at the side of the cap.

The base of the cap I5 is provided with the tapered nozzle l6.

Positioned within the barrel A is the piston 0 having the base I1 andthe side flanges 18. The tape D is attached to the base H by the anglemember l9 having the rivets 20. The tape D is I provided with openingsZlto receive the upper end 22 of the pawl 23 of the arrangement E.

The end of the cylinder A is closed by the cup 24 having the sideflanges 25 and having an opening 26 through which said tape D projects.

The tape D, as best shown in Figures 3 and 4, normally has a partialcircular cross section with the downwardly turned edges 26a.

The rear of the cylinder is provided with an extension F forming ahandle which overlaps the end of the cylinder at 21. The handle F may bemade in two pieces connected by the lugs 28 and 29 and it may have adownwardly extending rear portion 30 also having lug connections 3| and32.

Pivotally mounted in the sides 33 of the handle F is the Wheel 34 by thepivot rod 35, the tape D extending over said wheel 34 and through theslot 36 in the portion 3! of the handle F and inside of the guideelement 38 to the pull mem ber 39.

The guide elements 38 consist of two elements then have the verticalportions 45 with the openings Q5 and '51.

The openings 45 receive the pivot pin 48: mounted in the side walls 43and enclosed by'the bias the trigger 40 inthe coil springs 49 whichdirection 55 (see Figures 2 and 4). H i

The openings ll receive the pin 5! which serves as a pivot for the pawling encircled by the coil spring 52 which biases thepawl in thedirection 53, as indicated by the arrow in Figure 2.

The pin 53 acts as a stop limiting the upward movement of the pawlin thedirection 53 whereas the forward-edge of the slot 55 in the bottom ofthe handle F limits. the forward movement of the trigger id in thedirection 58.

In operation the cap B may be removed and the enclosure X may be filledwith grease, cream, paste, frosting or other plastic or viscousmaterial.

When the material is filled in the. space, the member 39 should be drawnfully in the direction indicated by the arrow Bil so as to move thepiston in the direction 5! (see Figure 2).

When the element 39 is moved in the direction 51 to draw the pistonvtofull charged position, the trigger fill should be moved in the direction52 so as to disengage the pawl 23, from the recess 21 in the tape D.

As soon as the space X is filled the cap B is applied andv then by:reciprocating the trigger do the piston C may be advanced by each fullreciprocatiomthe spacing between the two openings or notches 2i forcingmaterial through the At the Sametime, the element 35 will be moved inthe reverse direction of the arrow Bil. This operation may be repeateduntil the chamber may be entirely emptied of plastic or viscousmaterial.

The essential feature of the presentinvention residesin the tape D whicheliminates the use of 'a long rodfor actuating the piston l'i. Suchtape, instead of extending around to the outside of the cylinder,asindicated in Figure 2, may also bewound continuously around a roller34 and then retracted by a spring when, the pawl E is released. 7

It is apparent the specific illustrations above shown have been given byway of illustration and 23, said pin 5| becap and closure, said cylinderhaving a rearward extension, a right angular hand grip portion extendingtransversely away from the end of said extension, a roller memberpositioned in said extension, a lever member pivotally mounted in saidextension, and an actuating tape passing over said roller extendingthrough said closure and connected to said piston and actuated by saidlever member.

2. A'gu'n' for dispensing flowable plastic materials'comprising'acylinder having a detachable cap carrying a dispensing nozzle at one endand having a closure with a central opening at the other end, a pistonin said cylinder between said cap and closure, said cylinder having arearward extension, a right angular hand grip portion extendingtransversely away from the end of said extension, a roller memberpositioned in said extension, a lever member pivotally mounted in saidextension, and an actuating tape passing over said roller extendingthrough said closure and connected to said piston and actuated by saidlever member, said tape having a plurality of spaced openings along theperiphery thereof and said lever member being'provided with a pawl toengage and actuate said tape through said openings.

3'. A gun for dispensing fiowable plastic materials' comprising acylinder having a detachablecap carrying a dispensing, nozzle at one endand having, a closure with a central opening at the other end, a pistonin said cylinder between said cap and closure, said cylinder having arearward extension, a right angular hand grip portion extendingtransversely away from the end of said extension, a roller memberpositioned in said extension, a lever member pivotally mounted in saidextension, and an actuating tape passing over said roller extendingthrough said closure and comiectedto said piston and actuated by saidlever member, said tape having a plurality of spaced openings along theperiphery thereof and said lever member being, provided witha pawl toengage and actuate said tape through said openings, and coil springmembers associated with said lever and with said pawl to maintain saidleverand pawl in actuating position in respect to said 118408;"

ANTHONY MARRA.

